PREFETCHWT1 is its own category rather than being in AVX512
PREFETCHWT1 is its own category rather than being in AVX512

Change-Id: Iaaa9602e723842bf306ca7f00e2fcc6d77eb47fd
(cherry picked from commit ef3b170a3d8c199e83a14c8e05c4ca9195831a0e)

intelxed/xed,intelxed/xed,intelxed/xed,intelxed/xed